38 3. H. MAIDEN AND H. G. SMITH. 
obtained by precipitating the aqueous solution of Zucalypius _ 
hemiphloia kino, (from which the bodies soluble in ether had been 
removed) with neutral acetate of lead, and also that obtained by 
adding basic acetate of lead to the filtrate from the first precipitate, _ 
(which precipitates substances not thrown down by the neutral | 
salt), were taken. The lead from these precipitates was removed 
by sulphuretted hydrogen and the filtrates evaporated to dryness. 
By heating these two tannins in glycerine for half an hour * 
200° C. the decomposition product was in both cases catechol and 
not pyrogallol, and a yellowish resinous looking body, difficultly 
soluble in cold water, but soluble in boilin g water, was also removed | 
by the ether at the same time. : 
3 
| 
This reaction shows that the tannic acid was not one likely 
give ellagic acid as a decomposition product. When portions of : 
these same tannins were heated in a closed tube for one hour at 
100° C. with dilute hydrochloric acid, a body in appearance allied - 
to one of the red decomposition products known as kino red, elm 
red, hemlock red, &c., &c., is obtained as a product of decomp — 
sition. From these shciiee: although we might be inclined to look 
for two tannic acids, yet from the products of decomposition we 
must conclude that there is but one tannic acid in the kino of 
Eucalyptus hemiphloia. 
As the whole of the tannin of Angophora lanceolata is precipi: 
tated by neutral acetate of lead, we may infer the same also of | 
this kino, the decomposition products of the tannin obtained — ; 
from the lead precipitate being catechol when decomposed by heat : 
ing at 200° C. for half an hour, and protocatechuic acid and acetic | : 
acid when decomposed by fusing with potash. The reactions for 
the protocatechuic acid obtained from this tannin are most cleat 
and distinct, no other product appearing to be present to interfere. 
From the decomposition products of the tannins from Eucalyptes ; 
hemiphioia kino and from Angophora lanceolata kino, we conside? 
that these tannins are identical. 
